Not bad. The palette is nice and some of the poses are facial expressions are good. Photo reference?

These do have an amateurish feel to them though. I thinks it's mostly the fault of the medium you chose. Also, I think that some motifs are recognizable and derivative of other works. The helmet design of the valkryie, for instance, remind me of both Lord of the Rings and Skyrim.

I'd say that to cure the problem above, you should expand your interests beyond fantasy art and popular media to broaden your vision and expand your style.